Stationary exercise bicycle



FIG. 1 is a left side elevational view of the stationary exercise bicycle of the present invention;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines illustrate portions of the stationary exercise bicycle which form no part of the claimed design. 

The ornamental design for a stationary exercise bicycle, as shown and described. 